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L. J. TREGY.

HOT AIR FURNACE.

No. 371,108. Patented (m4, 1887.

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L. J. TRECY.

HOT AIR FURNACE. No. 371,108. Patented Oct. 4, 1887.

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UNITED STATES PATENT ()FFHC a LAURENCE J. T R-EOY, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO- THEODORE ALBES, OF SAME PLACE.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 371,108, dated Octeloer 4, 1887.

Application filed January 25, 1887. Serial No. 225,477. (No model.)

, and other buildings, and my object is to save fuel, gain time in heating, as well as to gain heat, and to make the furnace so as to be easily handled and controlled.

Of the drawings, Figure 1 is a front View of my improved furnace. Fig. 2 is a Vertical cross-section on line 2 2 of Fig. 4. Fig. 3 is a vertical longitudinal section on lines3 3 of Figs. 2 and 4-. Fig. 4 is a plan section on lines4 4 of Figs. 2 and 3. Fig. 5 is a detail viewv showing the manner of operating the fresh air dampers. Fig. 6 is a detail perspective view of the cap for regulating the supply of hotair through the igniting-pipes.

Similar letters refer to similar parts th roughout the several views.

A is the brick wall in which my furnace is placed, as ordinarily.

Bis theash-pit; O,tl1efire-boX; D, thedrum. The ashpitand fire-box I construct of wrought- 0 iron, thereby causing same to give'out greater heat than in the usual manner now in use, where the same are made of thick brick walls, whereby a large percentage of heat is lost, but which I now by my new construction save and ,5 utilize.

\Vithin the fire-box is placed a cast-iron lining, forming my fire-pot B, which is so placed and constructed as to leave an air space or passage, a, between it and the fire-box,

for the expansion of the air as it gets hotter, and entering at the rear of the fire-box, communicates or connects with the pipes E, placed along the rear and sides of the top edge of the fire-pot. The pipeE may, however, be placed as shown in dotted lines, entering the fire-pot below and communicating with the pipes E above, in order to obtain a more rapid heating of the air in said pipe. The pipes E are provided with jets or perforations 6, through which the heated air passes. Air entering the pipe E at e, and in its passage through the pipe becoming intensely heated, and coming out through the perforations of the pipes E, meets the smoke at these outlets, as shown by 6 arrows o Figs. 2, 3, and 4, igniting the gases in the smoke as they arise before escaping through the flue.

G is a cap placed in the hot-airinlet e of the pipe E, and within reach, having a slotted tube, 6, closely fitting the inside of the pipe, for the purpose of admitting more or less air as" the same is withdrawn more or less, allowing the slots 6 to extend out more or less.

F is the main flue, through which the fire and smoke escapes direct, when first starting same; but a damper, f, operated by suitable rods f, 820., when closed, compels the fire and smoke to passforward and divide, half passing to one side and half to the other, and entering radiating'pipes F at the forward end of the furnace, connecting to triangular-shaped radiating-pipes F along each side of the furnace, (see Fig. 2,) and finally through radiating-pipes F along the back of the furnace into the main flue F, behind the damper. The ob ject of making the radiating-pipes F triangular is to gain more heating-surface. These radiating-pipes F, F, and F are each capable of passing-one-half the amount of smoke which the main flue F is capable of doing; hence the areas of these pipes on both sides together in eross'section equal that of the main flue in crosssection. The hot air, as before described,1ningling with the smoke and igniting the gases contained in same,causes the radiating-pipes F, F and F to become and remain red-hot.

H are the inlets for fresh cold air, and are placed, preferably, in the rear furnace-wall. roo

Directly above the top line of these inlets,and extending along both sides and the rear of the furnace, are deflector plates H, turning on hinges it, (see Figs. 2, 3, and 5,) and operated 5 from the front by a rod, h, and wheel h said rod having an arm, h attached to the under side of the deflector-plates, and a leg, h, resting on the floor supporting the deflector-plates in the position shown in Fig. 5, causing the fresh air to be deflected inwardly against the body of the furnace and to pass through airspaces 9 and against the inclined deflectingplates 9, and become still more heated as it passes on and ascends through an inner heating-chamber, I, coming in contact with the hot sides of same and the hot sides of the furnace, then passing through the main chamber 1, and out through the openings I to the different parts of the building. The air which escapes the air-spacesg and deflecting-plates g is heated by passing around the pipes F, F, and F which are red-hot. To insure a still further heating of the air before passing into the outlets to the various rooms of the building a canopy, I is provided, extending around the two sides and rear of the inside of the furnace-walls, as shown in Figs. 2 and 3. This canopyis inclined upward,and extends toward the center of the furnace over the drum 0 and deflects the air toward the center of the furnace on its upward course, where it is still more heated before passing around the canopy and over it to the outlets.

In case the air is not required so hot the de- 3 5 fleeting-plates H are raised and the air mostly passes outside of the air-spaces and deflectingplates, thereby coming in contact with less heating-surface.

In order to operate all the deflector-plates 40 H at the same time the rear one overlaps the one having the operating parts, and the one opposite to this overlaps the rear deflectorplate. Thus all three communicate with each other, and the movement of one is communicated to the others.

J is a check-draft for controlling the fire. The air passing through enters the ash-pit under thefirer This check-draft is closed, shutting off the air to the fire below after same has a fair start, the coals thus glimmering and burning, but very slowly, and the gases being ignited above, thus cause a great saving of fuel. j is aweighted lever attached to the check and pivoted at j to the front of the furnace. A chain,j attached to the weighted arm of the lever, extends or leads to the hall or room over the furnace, where it can be operated to regulate the draft by any person, the tighten- 7 ing of the chain closing the check-draft, the weighted lever opening same when the chain is slack. K is the feed-door, K the door to the ash-pit, and L is the grate.

Having now fully described the construction of my hot-air furnace, the operation of same is as follows: On starting the fire the damper f of the main flue F and the check Jare opened to allow a free direct draft and passage of the smoke through the furnace. The opening or inlet 6 of the hot-air pipe E is closed until the fire has become fairly started. The damper f is then closed and the air contained in the pipes E and E has become heated. The cap G is withdrawn more or less to admit more or less hot air to the flames above the fire-pot, as before described. As the fresh air around the furnace now becomes heated, it rises and is led to the rooms, and fresh air enters the inlets H. The deflector-plates H are set and the air is thrown against the body of the furnace, passing between the inclined deflecting-plates and through the airspaces 9 into the inner heating-chamber, I, becoming heated by contact with its sides and the body of the furnace, thence passing through the main chamber 1, up and around the canopy l and out through the outlets I". v The air, as before described, which escapes the deflector-plates gand airspaces 9 passes around the radiating-pipes F, F, and Fiwhich, being red-hot, heat the same, which, meeting the hot air from the inner chamber, I, passes out with same, and in case the air is not required so hot the deflectorplates H are raised, allowing the air to pass at pleasure and become less heated by coming in contact with less heating-surface. Should it be desired to have more or less draft to the fire, the check can be opened or closed from the hall or room to which the chain is led from same, as before described.

The canopy I may be made to extend all around the four sides of the furnace, if desired.

What I claim is-= 1. The combination, with a hot-air furnace, of the radiating-pipes F F F, the main flue F, the damper f, and the deflecting-plates g, forming the air-spaces g, substantially as and for the purpose set forth.

2. The combination, with a hotair furnace, of the radiating-pipes F F F, the main flue F, the damperf, the inner heating-chamber, I, and the deflecting-plates g, forming the airspaces 9, substantially as and for the purpose set forth.

3. The'combination, with a hot-air furnace, of the radiating-pipes F F F, the main flue F, the damperf, the deflecting-plates 9', forming the air-spacesg, the fresh-airinlets H, and the deflector-plates H, placed directly above the fresh-air inlets H, and extending along both sides and rear of the furnace, turning on hinges h, secured to the inner faces of the furnace-walls A and operated from the outside by a wheel, h attached to a rod, h, or by other similar means, said rod having an arm, If, attached t0 the under side of one of said plates, and a leg, h, for supporting said plate, all of said plates being operated by the movement of this one plate by one overlapping the other, as described. substantially as and for the purpose set forth.

4. The combination, with a hot-air furnace, of the radiating-pipes F F F, the main flue F, the damperf, the inner heatingchamber, I,

IIO

the fresh-air inlets H, and the deflector-plates H, placed directly above the fresh-air inlets H and extending along both sides and rear of the furnace, turning on hinges 71, secured to the inner faces of the furnace-Walls A and operated from the outside by a wheel, 7L2, attached to a rod, h, or by other similar means, said rod having an arm, k attached to the under side of one of said plates, and a leg, h", for supporting said plate, all of said plates being operated by the movement of this one plate by one overlapping the other, as described, substantially as and for the purpose set forth.

5. The combination, with a hot-'airfurnace, of the radiating-pipes F F F the main flue F, the damper f, the deflecting-plates g, forming the air-spaces g, and the canopy 1 substantially as and for the purpose set forth.

6. The combination, With a hot-air furnace, of the radiatingpipes F E" E the main flue F, the damper f, the inner heating-chamber, I, the deflecting-plates g, forming the air-spaces g, and the canopy 1 substantially as and for the purpose set forth.

7. The combination, with a hot-air furnace, of the radiating-pipes F F F the main flue F, the damperf, the deflecting-plates 9, forming the air-spaces g, the canopy 1 the fresh air inlets H, and the deflector-plates H, placed directly above the fresh-air inlets H and extending along both sides and rear of the furnace, turning on hinges 71, secured to the inner faces of the furnace-walls A and operated from the outside by a wheel, h attached to a rod, h, or by other similar means, said rod having an arm, h, attached to the under side of one of said plates, and a leg, h, for supporting said plate, all of said plates being operated by the movement of this one plate by one overlapping the other, as described, substantially as and for the purpose set forth.

8. The combination, with a hot-air furnace, of the radiating-pipes F F F, the main line F, the damperf, theinnerheating-chamber, I, the deflecting-plates g, forming the air-spaces g, the canopy 1 the fresh-air inlets H, and the deflector-plates H, placed directly above the fresh-air inlets H and extending along both sides and rear ofthe furnace, turning on hinges 72, secured to the inner faces of the furnace walls A and operated from the outside by a wheel, if, attached to a rod, h, or by other similar means, said rod having an arm, h attached to the under side of one ofsaid plates, and a leg, h, for supporting said plate, all of L said plates being operated by the movement of this one plate by one overlapping the other, as described, substantially as and for the purpose set forth.

LAURENOE J. TREOY.

Witnesses:

CHAS. F. MEIsNER, J. HENRY SCHMIDT. 

